Electrical contact mechanism



June 10, 1930. r 5 FABER 1,762,219

' ELECTRICAL CONTACT MECHANISM Filed Jan. 29, 1926 7 Sheets-Sheet June,1930. G.S.FABER 1,762,219

ELECTRI CAL C ONTACT MECHANI S1! G. S. FABER ELECTRICAL CONTACTMECHANISM June 10, 1930.

Filed Jan. 29, 1926 7 Sheets-Sheet 4 .ZEzwenZa J1me 0- Q G. s. FABER1,762,219

I ELECTRICAL CONTACT MECHANISM Filed Jan. 29, 1926 '7 Sheets-Sheet I 5 ymam :lllllllllllllll 56 lllllnw June 10, 1930. s. s. FABE R ELECTRICALCONTACT MECHANISM 7 Sheets-Sheet 6 Filed Jan. 29, 1926 ELECTRICALCONTACT MECHANISM Filed Jan. 29, 1926 7 Sheets-Shet 'I LEE i y I v I iPatented June 10, 1930 U ITED STATES, PATENT OFFICE:

GUY S. FABER, OF

CHICAGO, ILLINOIS, ASSIGNOR TO JAS. P. MAB-SH 8: COMPANY, OF

CHICAGO, ILLINOIS, A CORFORATION OF ILLINOIS ELECTRICAL ooivrncrMECHANISM Application filedJanuary 29, 1926. Serial No. 84,619.

My invention relates generally to 'mechanism for controlling the makingand breaking of electrical circuits, and more particularly, though notexclusively, to contact deii vices of the type comprising a receptaclefor a flowable mass of current-conducting ma tcrial, as for examplemercury, and a set, or sets, of contacts therein, adapted to cooperatewith the circuit-controllingmercury.

One of my objects is to provide a novel, simple and reliably operatingconstruction of snap action mechanism, especially for use in connectionwith contact devices of the type referred to.

Another object is to provide a snap action mechanism of suchconstruction that a con-- tact device may be movable thereby into two ormore positions surh, as for example, cir cuit-controlling positions.

Another object is to provide a construction of mechanism wherein certainof the parts which it is desired be protected, are housed;

and other objects as will-be manifest from the following descrlptionz Ihave chosen to illustrate my invention as embodied in a mechanism forcontrolling the movement of an electrical switch contact device which isadapted for movement into more than twov positions to control contactsfor controlling, by way of example, valves in fuel lines, which latter,for example, may be of gas or oil lines, the mechanism being controlledresponsive to variations in the temperature of the water in the boilerheated by the fuel controlled by said valves.

Referring to the accompanying drawings I Figure 1' is a face view, withcertain parts sectioned, of a mechanism embodying my invention andoperative to control three electrical circuits by the movement of thecontact device into three positions; Figure 2 is an enlarged sectiontaken at the irregular lines 22 on Figs. 1 and 6 and viewed in thedirec- '7: L tion of the arrows. Flgure 3 1s a view like Fig. 2ofcertain of theparts therein shown, with certain of the parts shown inelevation. Figure 4 is a section taken at the line H on Fig. 2 andviewed in the direction of the arrows. Figure 5 is a sectionta ken atthe line 5 on Fig. 2 and viewed in the direction of the arrow. Figure 6is a section taken at the line 66 on Fig. 2 and viewed in the directionof the arrows. Figure 7 is a section taken at the line 77 on Fig. 2 andviewed in the direction or" the arrows. Figure 8 is a view in sectionalelevation of a pressure-actuated bellows device through the medium ofwhich, in the particular illustrated embodiment of my invention, myimproved mechanism is operated responsive to variations in temperature,this view being taken at the line 8-8 on Fig. 1 and viewed in thedirection of the arrows. Figures 9 and 10 are perspective views of tworelatively rotatable cooperating members through the medium of which themovements of the electrical contact device are controlled. Figure 11 isan enlarged broken plan view of the interengaging'portions of themembers shown in Figs; 9 and 10 showingone of-thepositions assumed bythe these parts. Figs. 11, 12, 13 and 14 are enlarged broken plan viewsof interengaging portions of the members shown in Figs. 9 and 10, theseseveral views showing difierent relative positions occupied by thesemembers in the operation of the device. Figure 15 is a sectional viewtaken at the line 15-15 on Fig. 5 and viewed in the direction of thearrows, show ing the construction of the illustrated contact device.Figure 16 is an enlarged view in vertical sectional elevation takenthrough the center set of contacts of the device of Fig. 15, this viewshowing the position assumed by the parts prior to the operation ofclosing the joint at this part of the receptacle. Figure 17 is a similarView. of these parts showing them in the position they assume upon beingadjusted into tight-joint-producing condition. Figure 18 is adiagrammatic view showing the contact portions of the contact device andthe valve devices controlling the supplying of fuel to the boiler inconnectionwith which my improved mechanism is adapted to cooperate forcontrolling these valves responsive to variations in the temperature ofthe water in the boiler, these valvesbeing in turn controlled by saidcontact device; and Figure 19, a view in eleva-.

tion, partly sect1onal,of a detail of removable stop mechanism forming apart of my improved mechanism.

Referring to the particular illustrated embodiment of my invention acontact device adapted to be moved into any of three differentelectrical-circnit-closing positions is represented at and is shown asof the tiltable receptacle type containing sets of electrical contactsspaced apart and adapted to have the gaps therebetween closed by a massof flowable material, as for example mercury, in the receptacle, thesesets of contacts being shown at 26, 27 and 28, each set comprising twocontacts insulated from each other and the mass of mercury referred torepresented at 29, it being understood that when the receptacle is inthe position shown in Fig. 15 the mercury will cooperate with the set ofcontacts 27; that when the receptacle is rocked to the dotted positionshown at the left in Fig. 15. the mercury will close the circuit at theset of contacts 26, and that when this receptacle is rocked in theopposite direction to the dotted line position shown at the rightof Fig.15, the circuit will be closed at the set 28 of contacts.

The mechanism by which the contact de vice 25 is automatically movedfrom one position to the other, above referred to, comprises aframe-work formed of side plates 30 and 31 rigidly connected together inparallel spaced reTation, by spacing connectors 32 and 33 and throughthe medium of which this framework is rigidly secured, in parallelspaced relation, to the back plate 31 of a casmg 35 housing theoperating mechanism and shown as having its front wall formed of a paneof glass.

The mechanism referred to further comprises a shaft 37 journalled at itsreduced end 38 in a socket 39 provided in the inner end of a nut 40screwed into the hub portion 41 of a gear 42, this hub portion beingjonrnalled in an opening 433 in the plate 31 and provlded at its innerend with a disk 44 rigid therewith.

The opposite end of the shaft 37 is enlarged to form a head 15 whichextends free- ].v through an opening 16 in the plate 30, this end of theshaft 37 having journal support on a point bearing 47 provided on a bar18 which extends freely through a transverse opening lt) in the head 15and is rigidly secured at its ends, as by the screws 50, to the plate30, the bearing 47 extending into a socket 51 in a wall of the openingas). The contact device is mounted on the shaft 37 at the head thereof.to move responsive to the rotation of this shaft, the device 25 to thisend having a threaded laterally extending boss 52 upon which is threadeda sleeve 53 surrounding a stub shaft 54 and clamping the head portion 55of the latter against the boss 52, with cushioning material 56interposed therebetween, the other end of this stub shaft extending intoa socket 56 in the outer end of the shaft 37 and rigidly held thereto bya set screw 57.

Surrounding the shaft 37, between its reduced portion 58 and the head45, is a sleeve 58 which is slidable on, and rotatable relative to, thisshaft. The sleeve 58 is the part through the medium of which the rockingof the head l5 and consequently the device 25, is effected to cause themercury in the latter to close the circuit at the various sets ofcontacts provided therein, the means shown for thus operating thisdevice comprising diametrically-opposed teeth 59 and 60 on one end ofthe sleeve 58, and diametrically-opposed sets 61 and 62 of teethextending from one end of the head 45 of the shaft 37. The side surfacesof the tooth 59 are represented at 63 and 64 and the side surfaces ofthe tooth 60 are represented at 65 and 66, these various surfacesforming cannning portions cooperating with the sets 61 and 62 of theteeth as hereinafter described. Each set of teeth 61 and 62 is formed oftwo full teeth and two half teeth, the full teeth of the set 61 beingrepresented at 67 and 68 and the half teeth at 69 and 70 and the fullteeth of the set 62 represented at 71 and 72 and the half teeth at 73and 74;. The side surfaces of the full teeth 67 and 68 and the sidesurfaces of the half teeth 69 and 70 are represented at 75, 76, 77, 78,79 and 80, and the side surfaces of the full teeth 71 and 72 and theside surfaces of the half teeth 73 and 74 are represented at 81, 82, 83,84, and 86, res )ectively, all of these designated surfaces constitutingcamming surfaces with which the teeth 59 and 60 on the sleeve 58,cooperate.

The sleeve 58 contains diametrically-opposed longitudinally extendingslots 87 into which arms 88 extend, these arms being rigidly carried by,and projecting from, the hub portion 89 of a drum 90 rotatably mountedon the shaft 37. The sleeve 58 is thus connected with the drum 90 torotate therewith, but. by reason of the provision of the slots 87 andarms 88, the sleeve 58 is adapted to move back and forth relative tothis drum, a coil spring 91 surrounding the shaft 37 and a portion ofthe sleeve 58, and bearing at one end against a flange 92 on thissleeve, and the face of the drum 90, yieldingly forcing this sleeve tothe left in Fig. into a position in which it extends at its teeth 59 and60 in intermeshed position relative to the sets 61 and 62 of teeth.

The spring 91, and the teeth-equipped portions of the head 45 and sleeve58, are protected by a housing formed of a cylindrical casing member 93integral with the head 45 and extending at its outer end in overlappedposition relative to an annular flange 94 on the drum 90, adust-excluding ring 95 of packing material being confined between theseoverlapping surfaces.

' springis connected with a pin 99 which is carried by the disk 44 andextends into the drum 90, this spring being housed, against access ofdirt thereto, by the disk 44 and drum 90 which are provided withoverlapping annular portions 100 and 101 at the circumference of thedrum 90, with a dust-excluding ring 102 of packing material confinedthcrebetween.

The spring 96 which is provided for the purpose of yieldingly resistingthe rotation of the drum 90 and sleeve 58 H1 counter-clockwise directionin Fig. 4, is adapted to be'tensioned to the degree desired, by means ofa pinion 103 journalled in the plate 31 and having a. knurled operatingstem 104, this pinion meshing with the gear 42, the plate 31 beingprovided with a pawl 106 pivoted thereto and adapted to engage the gear105 and retain it in the position to which it is adjusted in therotation of the pinion 103.

It may be here stated that the operation of the particular illustratedmechanism, is effected through the medium of the drum 90, as by a link107 pivotally connected, as indicated at 108, at its upper end to thedrum 90 cccentrically of its axis, and pivotally connected at its lowerend, as indicated at 109, with a lever 110 rigid on a shaft 111journailed in the side plates 30 and 31 of the casing mechanism, theforce controlling the conditioning of the mechanism being appliedthrough the lever 110 as hereinafter described.

As in the mechanism shown the rocking of the shaft 37 to the variouspositions occupied by it is effected by camming actions resulting fromthe relative rotation of the teeth on the shaft 37 and sleeve 58,respectively, it is necessary that stop means be provided forcooperation with the shaft 37 to permit of the multiple-stage movementsof the shaft 37 and consequently the contact device 25, a description ofthese stop means being as follows: Extending radially from the head 45is an arm 112 which terminates in a spring-pressed pin 113, and ismovable be-- tween stops 116 and 117 rigid with, and extending inwardlyfrom, the casing side 30. The pin 113 is shown as extending at itsheaded portion 114 into a socket 112" in the outer end of the arm 112,this pin being outwardly spring-pressed by a coil spring 113 in thesocket 112, a cap 115 screwed in the outer threaded end of the arm 112preventing displacement of the pin 113. Pivotally mounted at its rearend on a stud 118, is a lever 119 containing a notch 120 in its uppersurface with the flanking surfaces ofthe lever 119 curved as shownat 121and 122, the underside of this lever being provided with a taperingdepending lug 123 located in a recess 124 in the underside of the lever119 the adjacent surfaces of this recess at opposite sides of the lug123 being curved as shoWnat 125 and 125.

The arm 119 cooperates, at its lug 123 with a cross-pin 126 carried bythe bifurcated portion 127 of a head 128 rigidly secured to the shaft11.1 as by the set screw 129, a leaf spring 130 rigidly secured at oneend to the casing plate 30 andbearing at its curved free end against theup per surface of the lever 119 pressing the latter downwardly andmaintaining it in engagement with the pin 126 at all times.

In the particular arrangement shown, the mechanism described is operatedresponsive to the rise and fall of temperature, as for example thetemperature of water in a hot water boiler, to control the supplying offuel to the burner of the boiler. To this end the apparatus showncomprises the device represented at 131 and which is adapted to bepositioned in an opening in such a boiler to extend at its lower endinto the Water, the device shown comprising a tube portion 132 screwedinto an opening 133 in the side wall of the casing 34 and adapted toengage at its lower portion the threads of the opening in the boiler, areceptacle-forming member 134 open at its upper end at which it isscrewed into the lower end of the member 132 and provided to extend intothe water, and an expansible bellows portion 135 rigidly connected withthe upper end of the tube 132 and communicating with the latter, theupper end of this bellows being provided with a head 136 terminating inanupwardly extending bifurcated portion 137 straddling the lever 110 andconnected therewith, as by a pin 13S engaging this bifurcated portionand extending through any one of a plurality of openings in the lever110. The device 131 therefore presents a closed space subjected to theheat of the water and into which any suitable highly volatile material,as for example ether, is charged, the pressure generated by the ether,responsive to rise in the temperature to which the device 131 issubjected, actuating the bellows and therefore controlling the operationof the lever 110.

In the arrangement shown the burner (not shown (of the boiler issupplied with fuel, as

for example gas or oil, through one or both pipes 139 and 140 controlledby rock valves 141 and 142, respectively, the stems of which are rigidlyconnected with cross-bars 143 and 144', respectively, forming armaturesfor cooperation with electro-magnets 145 and 146. and 147 and 148,respectively, energization of the magnets 146 and 148, which separatelyact upon the respective armatures 143 and 144. moving the valves 141 and142 to open condition, and energization of the magnets 145 and 147moving these valves to closed condition, these valves being shown inopen position in Fig. 18. The set 26 of contacts comprise the twocontacts 1&9 and 150 connected, respectively, with the binding posts 151and 152; the set 27 of contacts comprise the contacts 153 and 154connected, respectively, with the binding posts 155 and 156, and the set28 of contacts comprise the contacts 157 and 158 connected,respectively, with the binding posts 159 and 160.

In the arrangen'ient shown the binding post 160 connects with a wire 161leading to a wire 162 connecting together one terminal of each of themagnets 145 and 147, the other terminals of these magnets beingconnected together by a wire 163 which connects with a wire 164 leadingby branch wires 165, 166, and 167, to the binding posts 152, 156 and159, respectively, a source of current, shown as a battery 168, beinginterposed in the wire 161-. One terminal of the magnet 146 connects, bya wire 169, with the binding post 155 and its other terminal connects bya wire 176 with the wire 16%. One terminal of the magnet 14:8 connectsby a wire 171 with the binding post 151, its other terminal connecting,by a wire 172, with the-wire 16a.

The valves 141 and 142 are simultaneously closed when the temperature ofthe boiler water, and to which the device 131 is subjected, rises to apredetermined degree, beyond which it is desired that the water not beheated. the contact device 25 under this condition being tilted inclockwise direction in Fig. to the position shown by the dotted lines atthe right-hand side of this Figure. As the temperature of he water inthe boiler cools the contact device is moved to the intermediate. fullline, position shown in Fig. 15 in which position the gas valve 141 iscaused to be opened; and in the event that the water continues to cool,the Contact device 25 rocks to the dotted line position shown at thelefthand side of Fig. 15, and the valve 142 opens, both of these valvesremaining r open until the Contact device 25 rotates back to the dottedline position shown at the righthand side of Fig. 15.

Figs. 1 to 7. inclusive, 11, 15 and 18 show the parts in the positionthey assume when the contact device is in the intermediate positionreferred to, following the opening of both of the valves 11-1 and 14:2,and the rise of temperature in the boiler, responsive to thusconditioning these valves. In this position of the parts the teeth 59and 66 extend into the valleys between the teeth 67' and 68, and 7.1 and72, respectively. As the temperature of the water in the boiler rises,it expands the bellows 135 and through the mediinn of the lever 110 andlink 107, rotates the drum 90 in counter-cloclnvise direction in Fig. 6,against the resistance of the spring 96. This tends to rotate the shaft537 in countor-clockwise direction in Fig. 6, owing to the engagement ofthe camming surfaces 63 and 66 with the cam surfaces 77 and 82. However,such rotation is prevented be- .ause the act of rocking the lever 110upwardly causes the pin 126 to ride against the lug 123 with the resultof rocking the lever 119 upwardly to a position in which the pin 113enters the notch 129. Thus continued rotation of the sleeve 58 causes itto move to the right on the shaft 37 without rotating the latter, until,the crests of the teeth 59 and 60 pass beyond the crests of the teeth 68and 71, respectively, whereupon the cam surfaces 64 and 65 of the teeth59 and 60, respectively, engage the cam surfaces 7 8 and 81 and underthe action of the spring 91 force the sleeve 58 to the left in Fig. 2,and rotate the shaft 37, clockwise to a position in which the arm 112engages the stop 116 in which movement the contact device 25 is rockedin clockwise direction in Fig. 15 to the dotted line position shown atthe right in this figure, the lowering of the lever 119 by thedisengagement of the pin 126 from the lug 123 permitting of thenioven'ient of the shaft 37 as stated.

The result of rocking the device to the position just stated is to causethe mercury 29 to flow to the right-hand end of the device, and closethe circuit in which the contacts 157 and 158 are interposed. thusclosing the circuits through the magnets 1 1:5 and 1-1-7, whereupon bothvalves 141 and lei-2 are rotated to closed position and fuel ceases tobe supplied to the burner.

As the water in the boiler cools, the bet lows 135 contract, under itsown elasticity, aided by the tension of the spring 96, thereby rotatingthe drum 96 in clockwise direction in Fig. 6. The shaft 37 being heldagainst clockwise rotation in this figure by engagement of the arm 112with the stop 116, the teeth 59 and 66 move at their surfaces 6% and 65against the surfaces 78 and S1 and in such movement shiftthe sleeve 58to the right in Fig. 2 until the extreme ends of the teeth 59 and 60pass the crests of the teeth 68 and 71, respectively, whereupon thespring 91 forces the sleeve to the left in Fig. 2 and by the engagementof the cam surfaces 63 and 66 of the teeth 59 and 60 with the surfaces77 and 92 of the teeth 68 and 71, rotates the shaft 37 backsubstantially to the intermediate position above referred to, the lever110, in the movement of the parts as just described, swingingsubstantially to the position shown in Fig. 6 wherein the lever 119 israised to the position therein shown wherein the pin 113 enters thenotch 126. The moven'ient of the de ice to the position just statedcauses the mercury 29 to close the circuit at the contacts 153 and 154,whereupon the magnet 146 is energized with the result of opening thevalve 141 and permitting of the flow of fuel to the burner.

1 'ng that the water in the boiler continues to cool, the drum 90 isrotated still mean in further in clockwise direction .in Fig. '6 by theaction of the bellows device 131, the cam surfaces 61 and 65 of theteeth '59 and 60 bearing against the cam surfaces 76 and 83 of the teeth67 and 72. Such engagement does not, however, rotate the shaft 37 inclockwise direction inasmuch as the pin 113 is in the notch 120.Therefore, continued rotation of the drum 90 as stated operates to forcethe sleeve 58 to the right in Fig. 2 until opens the valve 142,whereupon the fuel flowing through the rpe 139 to the burner isaugmented by the fuel flowing through the pipe 146; both of these valvesremaining open until the device 25 is rocked to the reversely incliningposition wherein the mercury closes the 011011111 at the contacts 157and 158.

The movement of the device 25 from the position in which the mercurycloses the circuit at the contacts 149 .and 150, to the position inwhich the mercury closes the circuit at the contacts 157 and 158involves the same step operations of the toothed members as describedabove, but in a reversedirection. Thus the temperature of the waterrises after both of the valves have been turned on as stated, the drinn90 is rotated in counterclockwise directien in Fig. 6 and the engagementof the teeth on the sleeve 58 and shaft 37, tend to rotate the shaft 37in thesame direction which movement, however, is prevented by theengagement of the arm 112 with the stop 117, until the teeth on thesleeve 58 ride over the teeth on the shaft 37 and with which theyengage, whereupon the shaft 37 is cannned in clockwise direction in Fig.6 to a position in which the contact device 25 is substantially in thefull line position shown in F ig. 15, the lever 110 rising to theposition shown wherein the lever 119 is forced to the position thereinshown wherein the pin 113 enters the notch 120.. By continual rise ofthe temperature of the water in the boiler rotation of the drum 90 incounter-clockwise direction in Fig. 6 continues but withoutcorrespondingly rotating the shaft 37 as the pin 113 remains in thenotch 120 until the crests of the teeth 59 and 60 pass over the crestsof the teeth 68 and 71. As soon as the teeth on the sleeve 58 pass overthe crests of the teeth 68 and 71, the latter is rotated in clockwisedirection to a position in which the device 25 closes the circuit at thecontacts 157 and 158, and both of the magnets 1 15 and 147 becomeenergized with the result above exp'lai'ned.

Referring now to the particular illustrated construction of contactdevice 25, it is'formed of a receptacle 173 preferably of molded quartzglass preferably of the shape shown, namely of elongated, practicallystraight,

form, with a. recess, represented at 17 1, in its lower portionextending opposite the contacts 153 and 1541, the receptacle at its endsand midway thereofnbeing formed with tubular bosses 175., 176 and 177,respectively, in which the several sets 26, 27 and 28 of contact devicesare located, the inner surfaces of these bosses tapering as indicated at178.

Each of the sets 26, 27 and 28 of contact devices are of the samegeneral construction and extend at their lower ends into a position inwhich the mercury engages therewith in the respective positions to whichthe receptacle 173 is rocked, as hereinbefore described, gas tightjoints being provided between the sets of contact devices and the bosses175, 176 and 177 in which they are located, by expansible sealingsleeves 17 9, 180 and 181.

Referring to the detailed showing in Figs. 16 and 17 of the set 27 ofcontact devices, the contact 1541 is of rod form with an opening 182extending entirely th-erethrough lengthwise of this rod, its upper,threaded, end 183 containing a small tube 184, as for example of brass,brazed, or otherwise secured, in the enlarged upper end of the opening182,]the rod 154 at its lower end being of enlarged diameter, asrepresented, with an annularly chamfered groove 185 in the top surfaceof this enlarged portion. The contact 154 is surrounded by the contact153 which is of tubular form, its inn-er surface being of substantiallythe same contour as the outer surface of the contact 151 as shown, witha sleeve 186 of any suitable current-insulating material interposedtherebetween and a washer 187 of insulating material sur.-,

rounding the threaded portion 183 of the contact 154 and engaging thetop surface of the.

sleeve 186, whereby the contact 15 1 is insulated from the contact 153.

The upper end of the Contact 153 is of upwardly tapering form as shownat which portion it is surrounded by the expansible, jointsealing,sleeve 180 of any suitable material, as for example lead. The sleeve 180which is preferably tapered internally as shown at 188, engages at itsinner surface with the tapered surface of the tubular contact 153 sothat when this tube is drawn upwardly in the boss 177 it will. expandthe sleeve, 180 and make a tight oint between it and the boss-177 andcontact 153 as shown in Fig. 17. The means shown for drawing the contact153 to the position. stated comprises a nut 189 screwed upon thethreadedportion 183 of the contact 154; and against a washer 190 ofcurrent-insulating material which latter bears against a contact plate191 which, in turn, bears against the upper end of the sleeve 180, itbeing understood that upon tightening the nut 189 the structurecomprising the contacts 153 and lo t, with the interposed insulatingmaterial 186, will be forced upwardly in the sleeve 180 which latter isheld down by the nut 189, thereby expanding the sleeve 180 intotight-joint-torming condition.

Owing to the action produced on the mercury by the breaking of thecircuitat the cont acts, it is necessary that the air in the receptacle173 be replaced by any desirable inert gas, or combination of gases, ora suitable liquid, as for example carbon tetrachloride, be charged intothe receptacle 173 to till it and the latter thereafter sealed, and topermit any of these operations to be performed I provide the contact154: of the hollow form shown and described and provide the tubeextension lSet through which latter the receptacle 173 may be evacuatedof its air content, where such is necessary or desirable, and thedesired material, as for example as above stated, introduced into thisreceptacle, the operator, following the charging operation, merelybending the upper end of the tube 18% upon itself to close the openingtherethrough and soldering the same, to seal the receptacle to theatmosphere.

The sets 26 and 28 of contact devices are the same as that justdescribed except that they are shorter in the particular constructionshown and their center contacts 150 and 158 are solid instead of hollow,it being undcrstood, however, that the center contacts of either ofthese sets may be hollow and titted with a tube like the tube 18%, incase it is desired that evacuation of the receptacle 173 and thecharging thereof, be effected through one of the end sets of contactdevices, or if desired two sets of contacts may be equipped with tubes18%, as for example in the filling of the receptacle with liquid theliquid entering the receptacle through one tube and the air ventingthrough the other.

It will be understood from the foregoing description that the contactdevice upon each operation thereof is moved by a snap action effectingdesirable quick breaking of the previously established circuit.

IVhile I have illustrated my invention as incorporated in a device formoving a circuitcontrolling device of the mercury tube type movable intothree positions, it will be understood that the invention may beutilized with other types of current-controlling devices and withdevices movable into a number of positions other than those described,and also may be used for rocking into different positionscontact-equipped ray-emitting tube devices, as for example, ultra-violetray tubes. These as well as other modifications may be made withoutdeparting from the spirit of my invention.

What I claim as new, and desire to secure by Letters Patent, is:

1. In electrical mechan sm, the combination of a member mounted to rock,a second member mounted to rotate and be moved in the direction of itslength relative to said first-named member, and mechanism operating whensaid second member is rotated to rock said first-named member comprisingcannning means formed of circumferontially arranged relatively movablecooperating projections on said mei'nbers, said projections beingcircumterentially separable and said means yieh'lingly forcing saidsecond member into engagement with said first-named memher.

2. In electrical mechanism, the combination of a member mounted to rock,a second member mounted to rotate and be moved in the direction of itslength relative to said iirstnamed member, and mechanisn'l operatingwhen said second member is rotated to rock said first named membercon'iprising eamming means formed 01 cireumferentially arrangedrelatively movable cooperating projections on said members, saidprojections being circumferentially separable, stops between which saidfirst-named member is movable and means yicldingly forcing said secondmember into engagement with said firstnamed member.

8. In electrical mechanism, the combination of a member mounted to rock,a second member mounted to rotate and be moved in the direction of itslength relative to said firstnamed member, and mechanism operating whensaid second member is rotated to rock said first named membercon'iprising circumferentially arranged relatively movable cooperatingteeth on said members, said teeth being circumterentially separable fromone another and means yieldingly forcing the tooth on said second memberinto en ga gcmcnt with the tooth on said first-named member.

4. In electrical mechanism, the combination of a member mounted to rock.a second member mounted to rotate and be moved in the direction o't itslength relative to said first-named member, and mechanism operating whensaid second member is rotated to rock aid first named member comprisinga plurality of aligned relatively movable cooperating teeth on saidmembers, said teeth being separable transversely from each other, stopsbetween which said first-named member is movable and means yicldinglyforcing the tooth on said second member into engagement with the toothon said first-nai'ned member.

In electrical mechanism, the combination of a member mounted to rock, asecond member mounted to rotate and be moved lengthwise relative to saidfirst-named memher, and mechanism operatlng when said second member isrotated to rock said first named member comprising a projection on oneof said members, a series of camming projections on the other of saidmembe "s and cooperating with said projection, stops between which saidtirstnamed member is movable, a movable stop member located between saidstops and movable into and out of oper ative position, means operatingin timed relation to the rotation of said second member tor controllingthe position of said stop memher, and means yieldingly forcing saidsecond member into engagement with said firstnamed member.

6. In electrical mechanism the combination of a member mounted to rock,a second member mounted to rotate and be moved in the direction of itslength relative to said firstnamed member, mechanism operating when saidsecond member is rotated to rock said first-named member comprisingcannning means formed of cooperating projections on said members andmeans yieldingly forcing said second member into engagement with saidfirst-named member, and a spring yieldingly resisting the rotation ofsaid second member in one direction.

7. In electrical mechanism, the combination of a member mounted to rock,a second member mounted in axial alignment with said first-named memberto rotate, and be moved lengthwise, thereon, a third member rotatablewith said second member and relative to which said :ond member islongitudinally movable, mechanism operating when said second member isrotated to rock said firstnauied member con'iprising camming meansformed of cooperating projections on said first-named member and saidsecond member and means yieldingly forcing said second member intoengagement at its projection with the pro ection on said first-namedmemr her, and spring means engaging said third member and vieldinglyresisting rotation of said third member in one direction.

8. In electrical mechanism, the combination of a member mounted to rock,a second member mounted in axial aligmnent with said first-named memberto rotate, and be moved lengthwise, thereon, a third member mounted inaxial alignment with said firs named member and rotatable with saidsecond member and relative to which said second member is longitudinallymovable, mechanism operating when said second member is rotated to rocksaid first-named member comprising camming means formed of cooperatingprojections on said first-named member and said second member and meansyieldingly forcing said second member into engagement at its projectionwith the projection' on said first-named member, and spring meansengaging said third member member mounted on said first-named memher torotate,and be moved lengthwise, thereon, a third member mounted on saidfirstnamed member and rotatable with said second member and relative towhich said second member is longitudinally movable, mechanism operatingwhen said second member is rotated to rock said first-named membercomprising camming means formed of cooperating projections on saidfirst-named member and said second member, means yieldingly forcing saidsecond member into engagement at its projection with the projection onsaid first-named member, and spring means engaging said third member andyieldingly resisting rotation of said third member in one direction.

10. In electrical mechanism, the combination of a member mounted torock, a second member mounted on said iirst-named memher to rotate, andbe moved lengthwise, thereon, a third member mounted on said firstnamedmember and rotatable with said second member and relative to which saidsecond member is longitudinally movable, mechanism operating when saidthird named memher is rotated to rock said first-named member comprisingcamming means formed of cooperating projections on said first-namedmember and said second member and means yieldingly forcing said se 011dmember into engagement at its projection with the projection on saidfirst-named member, and a spring encircling said tirst-named member idei'igaging said third member and coopersting to yeildingly resistrotation of said third member in one direction 11. In electricalmechanism, the combination of a member mounted to rock, a second membermounted in axi al alignment with said first-named member to'rotate, andbe moved lengthwise, thereon, a third member mounted in dXltll alignmentwith said firstnamed member and rotatable with said sec ond member andrelative to which said second member islongitudinall y' movable,mechanism operating when said second member is rotated to rock saidfirst-named member comprising camming means formed of cooperatingprojections on said first-named member and said second member, and means12. In electrical mechanism, the combina i tion of a member mounted torock, a second member mounted in axial alignment with said first-namedmember to rotate. and be moved lengthwise, thereon, athird membermounted in axial alignment with said tirstnamed membcand rotatable withsaid second member and relativeto..which said second member islongitudinally mo able, mechanism operatin when said second memher isrotated to rocK said first-named member comprising camming means formedof cooperatingprojections on said first-named member and said secondmember and means yieldingly forcing said second member into engagementat its projection with the projection on said first-named member, springmeans engaging said third member and yield ingly resisting rotation ofsaid third member in one direction, and a housing for said second-namedmeans and said spring means and formed of se'tions connected with saidtirstnamed member and said third member.

13. In electrical mechanism, the combination of a member mounted torock, a second member mounted to rotate and be moved to ward and awayfrom said first-named member, mechanism operating when said secondmember is rotated to rock said first-named member comprising cammingmeans formed of cooperating projections on said members and meansvicldingly forcing said second member into engagement with saidtirstnamed member. and rotatable means axially aligned with saidfirst-named member for rotating said second member.

14. In electrical mechanism, the combination of a member mounted torock, a second member mounted to rotate and be moved toward and a a fromsaid first-named member, and mechanism operating when said second memberis rotated to rock said firstnamed member comprising a projection on oneof said members, a se ies of camming projections on the other of s. 1dmembers and cooperating with said projection. stops be tween which saidfirst-named member is movable. a movable stop member located betweensaid stops and movable into and out of operative position, meansoperating in timed relation to the rotation of said second member forcontrolling the position of said stop member, and means yieldinglyforcing said second member into engagement with said firstnamed member.

15. In electrical mechanism, the combination of a member mounted torock, a second member mounted in axial alignment with said first-namedmember to rotate and be moved to a rd and away from said first-namedmember. a third member rotatable with said second member and relative towhich said second member is longitudinally movable, mecha nism operatingwhen said second member is rotated to rock said first-named membercomprising cannning means formed of cooperating projections on saidfirst-named member and said second member and means yieldingly forcingsaid second member into engagement at its projection with the projectionon said first-named member, and spring means engaging said third memberand yieldingly resisting rotation 01 said third member in one direction.

16. In electrical mechanism, the combina tion of a member mounted torock, a second member mounted in axial alignment with said first-namedmember to rotate and be moved toward and away from said firstnaincdmember, a third member rotatable with said second member and relative towhich said second member is longitudinally movable. mechanism operatingwhen said second member is rotated to rock said firstnamed membercomprising camming means formed of cooperating projections on saidtirst-nan'ied member and said second member and 3131118 yieldinglvforcing said second member into engagement at its projection with theprojection on said first-named member, spring means engaging said thirdmember and vieldingly res sting rotation of said third member i 11 onedirection, and a housing for said second-nan'ied means and said springmeans.

17. In electrical mechanism, the combination of a member mounted torock, a second member mounted to rotate and be moved toward and a wa vfrom said first-named membe. and mechanism ope 'ating when said secondmember is rotated to rock said firstnamed member comprising a projectionon one oi said members, a series of camming projections on the other ofsaid members and cooperating with said projection, stops between whichsaid first-named member is mov-- able, a movable stop member locatedbetween s2. id stops and movable into and out of operati're position.said first-named member having a portion adapted to engage with saidmovable stop member, means ope 'ating in timed relation to the rotationof said second member for controlling the position of said stop member.and means yieldingly forcing said second member into engagement withsaid ti rst-named member.

18. In electrical mechanism. the combination of amember mounted to rock,a second member mounted to rotate and be moved to ward and away fromsaid first-named memher, and mechanism operating when said second memberis rotated to rock said firstnamed member comprising a projection on oneof said members, a. series of cannning projections on the other of saidmembers and cooperating with said projection, stops bet-ween whica saidfirst-named member is movable, a movable notched stop member locatedbetween said stops and movable into and out of operative position, saidfirst-named member having a portion adapted to enter the notch in saidmovable stop member, means operating in timed relation to the rotationof said second member for controlling the position of said stop member,and means yieldingly forcingsaid second member into engagement with saidfirst-named member.

19'. In electrical mechanism, the combination of a member mounted torock, a second member mounted to rotate and be moved toward and awayfrom said first-named member, and mechanism operating when said secondmember is rotated to rock said firstnamed member comprising a projectionon one of said members, a series of camming projections on the other ofsaid members and cooperating with said projection, stops between whichsaid first-named member is movable, a movable notched stop memberlocated between said stops and movable into and out of operativeposition, said movable stop member having receding surfaces adjoiningthe notch therein and said firstnamed member having a portion adapted toenter the notch in said movable stop member, means operating in timedrelation to the rotation of said second member for controlling theposition of said stop member, and means yieldingly forcing said secondmember into engagement with said first-named member.

20. In electrical mechanism, the combina tion of a member mounted torock, a second member mounted to rotate and be moved toward andaway'from said first-named member, and mechanism operating when saidsecond member is rotated to rock said firstnamed member comprising aprojection on one of said members, a series of camming projections onthe other of said members and cooperating with said projection, stopsbetween which said first-named member is movable, a movable notched stopmember located between said stops and movable into and out of operativeposition, said first-named member having a yielding portion adapted toenter the notch in said movable stop mem ber, means operating in timedrelation'to the rotation of said second member for controlling theposition of said stop member, and means yieldingly forcing said secondmember into engagement with said first-named member.

21. In electrical mechanism, the'combination of a member mounted torock, a second member mounted to rotate and. be moved towardand awayfrom said first-named memher, and mechanism operating when said secondmember is rotated to rock said firstnamed member comprising a projectionon one of said members, a series of camming projections on the other ofsaid members and cooperatin with said projection, stops between whicsaid first-named member is movable, a movable notched stop memberlocated between said stops and movable into and out of operativeposition, said movable stop memsaid second member for controlling theposition of said stop member, and means yieldingly forcing said secondmember into engagement with said first-named member.

GUY S. FABER.

